Object that we can observe where all 3 types of redshifts

  • Context: Graduate 
  • Thread starter Thread starter Sanjay87
  • Start date Start date
Click For Summary
SUMMARY

The discussion centers on the observation of objects exhibiting all three types of redshifts: Doppler, gravitational, and cosmological. It is established that redshift components are typically not easily separated, with cosmological redshift being the dominant factor. Supermassive black holes exhibit negligible gravitational redshifts due to their luminosity being located far from the event horizon. Additionally, Doppler redshift is often minimal, as proper motions are usually a small fraction of the speed of light. Ultimately, while different physical processes can lead to a specific redshift, it is not possible to measure the cause of redshift for an individual object.

PREREQUISITES
  • Understanding of redshift types: Doppler, gravitational, and cosmological
  • Familiarity with supermassive black holes and their properties
  • Knowledge of the speed of light and its implications in astrophysics
  • Basic concepts of observational astronomy and redshift measurement
NEXT STEPS
  • Research the methods for measuring cosmological redshift in distant galaxies
  • Explore the implications of gravitational redshift in the vicinity of black holes
  • Study the effects of proper motion on Doppler redshift in astronomical observations
  • Investigate the role of supernovae in demonstrating redshift phenomena
USEFUL FOR

Astronomers, astrophysicists, and students interested in the complexities of redshift and its implications in the study of the universe.

Sanjay87
Messages
20
Reaction score
0
Hi,

Is there any kind of object that we can observe where all 3 types of redshifts can be clearly identified - Doppler, gravitational and cosmological?

Thank you.

San
 
Astronomy news on Phys.org
All of them. Redshift components are not easily separated. Cosmological redshift is usually the dominant component. Even super massive black holes have insignificant gravitational redshifts because most luminosity occurs too distant from the event horizon to be measurably affected. Doppler redshift is also a weak player. Proper motions - with the exception of supernova ejecta - are rarely more than a tiny fraction of the speed of light.
 
There is only one redshift. We can determine different physical processes that may have lead to an object having a given redshift, but observationally redshift is redshift so you can't measure anything that will tell you what caused the redshift to occur for an individual object.
 

Similar threads

Undergrad Challenges to the Redshift Method and Hubble's Law
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Need help simplifying standard error formula for redshift
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Energy conservation in Doppler (NOT cosmological) redshifts?
  • · Replies 13 ·
Replies
13
Views
3K
High School Consequences of the Existence of Gravitational Waves?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate How deep in a gravitational well are we?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad The Boundary of the Observable Universe
  • · Replies 44 ·
2
Replies
44
Views
7K
Undergrad Observed Redshift from Moving Source: Deriving the Result
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Are black holes more redshifted than the CMB?
  • · Replies 10 ·
Replies
10
Views
3K
Undergrad Does the Cosmological Principle in any way underpin Big Bang Theory?
  • · Replies 33 ·
2
Replies
33
Views
4K
Graduate Speed of light (from redshifted galaxies)
  • · Replies 5 ·
Replies
5
Views
3K